Immunodiagnostic Systems Holdings PLC provided unaudited revenue guidance for the first half of 2017. Unaudited Group revenue for first fiscal year 2017 is expected to be £19.5 million, in line with the £19.4 million recognized for the same period last year. On a like for like basis the revenue decreased by 9%. There were no changes in scope, thus the difference is entirely due to changes in exchange rates.